# Relationship history for MSHA mine 0505055

Current hierarchy: **David  Tarbet; Jeff  Chenoweth → Southwest Crushing & Aggregate, LLC → Southwest Crushing Portable Jaw Crusher**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Jeffrey S Chenoweth → Southwest Crushing Portable Jaw Crusher; 2013-05-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** J & P Trucking → Southwest Crushing Portable Jaw Crusher; 2015-12-09 to 2022-01-13; source msha-controller-operator-history
- **controller_controls_operator:** Jeffrey S Chenoweth → J & P Trucking; 2015-12-09 to 2022-01-13; source msha-controller-operator-history
- **operator_operates_mine:** Southwest Crushing & Aggregate, LLC → Southwest Crushing Portable Jaw Crusher; 2022-01-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jeff  Chenoweth et al → Southwest Crushing Portable Jaw Crusher; 2022-01-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeff  Chenoweth et al → Southwest Crushing & Aggregate, LLC; 2022-01-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Tarbet et al → Southwest Crushing & Aggregate, LLC; 2022-01-14 to current/open; source msha-controller-operator-history